How many solutions does this equation have? y=2x+1
y=-2x+1

a. one solution
b. no solution
c. infinite solutions

(note i put the graph in so plz )the graph shows the amount of water that remains in a barrel after it begins to leak. the variable x represents the number of days that have passed since the barrel was filled, and y represents the number of gallons of water that remain in the barrel. what is the slope of the line

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?